X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/8f8ed8f4e50fd98aa43ee69971cac8bda55760f1..107d054ba954d05965f793f560468c6c453cc2a5:/apt-pkg/contrib/hashes.cc diff --git a/apt-pkg/contrib/hashes.cc b/apt-pkg/contrib/hashes.cc index 66ae33146..417982343 100644 --- a/apt-pkg/contrib/hashes.cc +++ b/apt-pkg/contrib/hashes.cc @@ -11,17 +11,23 @@ ##################################################################### */ /*}}}*/ // Include Files /*{{{*/ +#include + #include #include #include -#include +#include +#include +#include -#include +#include +#include +#include #include #include /*}}}*/ -const char* HashString::_SupportedHashes[] = +const char * HashString::_SupportedHashes[] = { "SHA512", "SHA256", "SHA1", "MD5Sum", NULL }; @@ -30,20 +36,25 @@ HashString::HashString() { } -HashString::HashString(string Type, string Hash) : Type(Type), Hash(Hash) +HashString::HashString(std::string Type, std::string Hash) : Type(Type), Hash(Hash) { } -HashString::HashString(string StringedHash) /*{{{*/ +HashString::HashString(std::string StringedHash) /*{{{*/ { - // legacy: md5sum without "MD5Sum:" prefix - if (StringedHash.find(":") == string::npos && StringedHash.size() == 32) + if (StringedHash.find(":") == std::string::npos) { - Type = "MD5Sum"; - Hash = StringedHash; + // legacy: md5sum without "MD5Sum:" prefix + if (StringedHash.size() == 32) + { + Type = "MD5Sum"; + Hash = StringedHash; + } + if(_config->FindB("Debug::Hashes",false) == true) + std::clog << "HashString(string): invalid StringedHash " << StringedHash << std::endl; return; } - string::size_type pos = StringedHash.find(":"); + std::string::size_type pos = StringedHash.find(":"); Type = StringedHash.substr(0,pos); Hash = StringedHash.substr(pos+1, StringedHash.size() - pos); @@ -51,83 +62,267 @@ HashString::HashString(string StringedHash) /*{{{*/ std::clog << "HashString(string): " << Type << " : " << Hash << std::endl; } /*}}}*/ -bool HashString::VerifyFile(string filename) const /*{{{*/ +bool HashString::VerifyFile(std::string filename) const /*{{{*/ +{ + std::string fileHash = GetHashForFile(filename); + + if(_config->FindB("Debug::Hashes",false) == true) + std::clog << "HashString::VerifyFile: got: " << fileHash << " expected: " << toStr() << std::endl; + + return (fileHash == Hash); +} + /*}}}*/ +bool HashString::FromFile(std::string filename) /*{{{*/ { - FileFd fd; - MD5Summation MD5; - SHA1Summation SHA1; - SHA256Summation SHA256; - SHA256Summation SHA512; - string fileHash; + // pick the strongest hash + if (Type == "") + Type = _SupportedHashes[0]; + + Hash = GetHashForFile(filename); + return true; +} + /*}}}*/ +std::string HashString::GetHashForFile(std::string filename) const /*{{{*/ +{ + std::string fileHash; FileFd Fd(filename, FileFd::ReadOnly); - if(Type == "MD5Sum") + if(strcasecmp(Type.c_str(), "MD5Sum") == 0) { - MD5.AddFD(Fd.Fd(), Fd.Size()); - fileHash = (string)MD5.Result(); - } - else if (Type == "SHA1") + MD5Summation MD5; + MD5.AddFD(Fd); + fileHash = (std::string)MD5.Result(); + } + else if (strcasecmp(Type.c_str(), "SHA1") == 0) { - SHA1.AddFD(Fd.Fd(), Fd.Size()); - fileHash = (string)SHA1.Result(); - } - else if (Type == "SHA256") + SHA1Summation SHA1; + SHA1.AddFD(Fd); + fileHash = (std::string)SHA1.Result(); + } + else if (strcasecmp(Type.c_str(), "SHA256") == 0) { - SHA256.AddFD(Fd.Fd(), Fd.Size()); - fileHash = (string)SHA256.Result(); + SHA256Summation SHA256; + SHA256.AddFD(Fd); + fileHash = (std::string)SHA256.Result(); } - else if (Type == "SHA512") + else if (strcasecmp(Type.c_str(), "SHA512") == 0) { - SHA512.AddFD(Fd.Fd(), Fd.Size()); - fileHash = (string)SHA512.Result(); + SHA512Summation SHA512; + SHA512.AddFD(Fd); + fileHash = (std::string)SHA512.Result(); } Fd.Close(); - if(_config->FindB("Debug::Hashes",false) == true) - std::clog << "HashString::VerifyFile: got: " << fileHash << " expected: " << toStr() << std::endl; - - return (fileHash == Hash); + return fileHash; } /*}}}*/ -const char** HashString::SupportedHashes() +const char** HashString::SupportedHashes() /*{{{*/ { return _SupportedHashes; } - -bool HashString::empty() const + /*}}}*/ +APT_PURE bool HashString::empty() const /*{{{*/ { return (Type.empty() || Hash.empty()); } + /*}}}*/ +std::string HashString::toStr() const /*{{{*/ +{ + return Type + ":" + Hash; +} + /*}}}*/ +APT_PURE bool HashString::operator==(HashString const &other) const /*{{{*/ +{ + return (strcasecmp(Type.c_str(), other.Type.c_str()) == 0 && Hash == other.Hash); +} +APT_PURE bool HashString::operator!=(HashString const &other) const +{ + return !(*this == other); +} + /*}}}*/ + +bool HashStringList::usable() const /*{{{*/ +{ + if (empty() == true) + return false; + std::string const forcedType = _config->Find("Acquire::ForceHash", ""); + if (forcedType.empty() == true) + return true; + return find(forcedType) != NULL; +} + /*}}}*/ +HashString const * HashStringList::find(char const * const type) const /*{{{*/ +{ + if (type == NULL || type[0] == '\0') + { + std::string const forcedType = _config->Find("Acquire::ForceHash", ""); + if (forcedType.empty() == false) + return find(forcedType.c_str()); + for (char const * const * t = HashString::SupportedHashes(); *t != NULL; ++t) + for (std::vector::const_iterator hs = list.begin(); hs != list.end(); ++hs) + if (strcasecmp(hs->HashType().c_str(), *t) == 0) + return &*hs; + return NULL; + } + for (std::vector::const_iterator hs = list.begin(); hs != list.end(); ++hs) + if (strcasecmp(hs->HashType().c_str(), type) == 0) + return &*hs; + return NULL; +} + /*}}}*/ +bool HashStringList::supported(char const * const type) /*{{{*/ +{ + for (char const * const * t = HashString::SupportedHashes(); *t != NULL; ++t) + if (strcasecmp(*t, type) == 0) + return true; + return false; +} + /*}}}*/ +bool HashStringList::push_back(const HashString &hashString) /*{{{*/ +{ + if (hashString.HashType().empty() == true || + hashString.HashValue().empty() == true || + supported(hashString.HashType().c_str()) == false) + return false; + + // ensure that each type is added only once + HashString const * const hs = find(hashString.HashType().c_str()); + if (hs != NULL) + return *hs == hashString; -string HashString::toStr() const + list.push_back(hashString); + return true; +} + /*}}}*/ +bool HashStringList::VerifyFile(std::string filename) const /*{{{*/ +{ + if (list.empty() == true) + return false; + HashString const * const hs = find(NULL); + if (hs == NULL || hs->VerifyFile(filename) == false) + return false; + return true; +} + /*}}}*/ +bool HashStringList::operator==(HashStringList const &other) const /*{{{*/ +{ + std::string const forcedType = _config->Find("Acquire::ForceHash", ""); + if (forcedType.empty() == false) + { + HashString const * const hs = find(forcedType); + HashString const * const ohs = other.find(forcedType); + if (hs == NULL || ohs == NULL) + return false; + return *hs == *ohs; + } + short matches = 0; + for (const_iterator hs = begin(); hs != end(); ++hs) + { + HashString const * const ohs = other.find(hs->HashType()); + if (ohs == NULL) + continue; + if (*hs != *ohs) + return false; + ++matches; + } + if (matches == 0) + return false; + return true; +} +bool HashStringList::operator!=(HashStringList const &other) const { - return Type+string(":")+Hash; + return !(*this == other); } + /*}}}*/ -// Hashes::AddFD - Add the contents of the FD /*{{{*/ -// --------------------------------------------------------------------- -/* */ -bool Hashes::AddFD(int Fd,unsigned long Size) +// Hashes::Add* - Add the contents of data or FD /*{{{*/ +bool Hashes::Add(const unsigned char * const Data,unsigned long long const Size, unsigned int const Hashes) +{ + bool Res = true; +#if __GNUC__ >= 4 + #pragma GCC diagnostic push + #pragma GCC diagnostic ignored "-Wdeprecated-declarations" +#endif + if ((Hashes & MD5SUM) == MD5SUM) + Res &= MD5.Add(Data, Size); + if ((Hashes & SHA1SUM) == SHA1SUM) + Res &= SHA1.Add(Data, Size); + if ((Hashes & SHA256SUM) == SHA256SUM) + Res &= SHA256.Add(Data, Size); + if ((Hashes & SHA512SUM) == SHA512SUM) + Res &= SHA512.Add(Data, Size); +#if __GNUC__ >= 4 + #pragma GCC diagnostic pop +#endif + return Res; +} +bool Hashes::AddFD(int const Fd,unsigned long long Size, unsigned int const Hashes) { unsigned char Buf[64*64]; - int Res = 0; - int ToEOF = (Size == 0); + bool const ToEOF = (Size == UntilEOF); while (Size != 0 || ToEOF) { - unsigned n = sizeof(Buf); - if (!ToEOF) n = min(Size,(unsigned long)n); - Res = read(Fd,Buf,n); - if (Res < 0 || (!ToEOF && (unsigned) Res != n)) // error, or short read - return false; + unsigned long long n = sizeof(Buf); + if (!ToEOF) n = std::min(Size, n); + ssize_t const Res = read(Fd,Buf,n); + if (Res < 0 || (!ToEOF && Res != (ssize_t) n)) // error, or short read + return false; if (ToEOF && Res == 0) // EOF - break; + break; Size -= Res; - MD5.Add(Buf,Res); - SHA1.Add(Buf,Res); - SHA256.Add(Buf,Res); - SHA512.Add(Buf,Res); + if (Add(Buf, Res, Hashes) == false) + return false; + } + return true; +} +bool Hashes::AddFD(FileFd &Fd,unsigned long long Size, unsigned int const Hashes) +{ + unsigned char Buf[64*64]; + bool const ToEOF = (Size == 0); + while (Size != 0 || ToEOF) + { + unsigned long long n = sizeof(Buf); + if (!ToEOF) n = std::min(Size, n); + unsigned long long a = 0; + if (Fd.Read(Buf, n, &a) == false) // error + return false; + if (ToEOF == false) + { + if (a != n) // short read + return false; + } + else if (a == 0) // EOF + break; + Size -= a; + if (Add(Buf, a, Hashes) == false) + return false; } return true; } /*}}}*/ - +HashStringList Hashes::GetHashStringList() +{ + HashStringList hashes; +#if __GNUC__ >= 4 + #pragma GCC diagnostic push + #pragma GCC diagnostic ignored "-Wdeprecated-declarations" +#endif + hashes.push_back(HashString("MD5Sum", MD5.Result().Value())); + hashes.push_back(HashString("SHA1", SHA1.Result().Value())); + hashes.push_back(HashString("SHA256", SHA256.Result().Value())); + hashes.push_back(HashString("SHA512", SHA512.Result().Value())); +#if __GNUC__ >= 4 + #pragma GCC diagnostic pop +#endif + return hashes; +} +#if __GNUC__ >= 4 + #pragma GCC diagnostic push + #pragma GCC diagnostic ignored "-Wdeprecated-declarations" + #pragma GCC diagnostic ignored "-Wsuggest-attribute=const" +#endif +Hashes::Hashes() {} +Hashes::~Hashes() {} +#if __GNUC__ >= 4 + #pragma GCC diagnostic pop +#endif